Derivative Financial Instruments and Fair Value Measurements (Contingent Consideration Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Business Acquisition Contingent Consideration [Rollforward]
Beginning Balance - Contingent Consideration	$ (15,279)	$ (21,010)
Business Combination, Consideration Transferred, Liabilities Incurred	0	0
Payments For Proceeds From Previous Acquisition	4,330	4,554	$ 204
Fair Value Of Contingent Consideration	371	(1,158)	884
Foreign exchange	0	19
Ending Balance - Contingent Consideration	$ (11,320)	(15,279)	$ (21,010)
Niagara Natural [Member]
Business Acquisition Contingent Consideration [Rollforward]
Fair Value Of Contingent Consideration		$ 1,700